2006 Audi S4 on 2040-cars

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Audi is working on a suspension that gets power from bumpy roads

Regenerative brakes aren't new. They're on virtually every hybrid and EV, and they're even starting to pop up on traditional gas-powered cars, like with the i-ELOOP-equipped Mazda6. But even with these systems, cars can get more efficient, and Audi thinks it found yet another source of wasted energy. The source? The suspension. The idea is to turn the kinetic energy that goes into the dampers into usable energy instead of as waste heat. Audi isn't the first auto company to come up with regenerative suspension – nearly three years ago, ZF introduced its GenShock technology, which used a valve attached to traditional, oil-filled hydraulic shocks to recapture kinetic energy from movement caused by bumps in the road. Audi's prototype technology, which it calls eROT, replaces traditional dampers with horizontally oriented electromechanical rotary dampers. eROT is apparently short for electromechanical rotary damper. Neat. In testing, eROT recovered an average of 100 to 150 watts on a typical German road, three watts from a fresh piece of pavement, and 613 watts on a rough stretch of tarmac (wattage is calculated as power over time, so this is actually the rate at which the system harvests energy). The dampers channel that energy to a tiny, 0.5-kWh, 48-volt battery. The prototype is claimed to cut CO2 emissions by three grams per kilometer (4.8 grams per mile), while the company believes a future production version could save up to 0.7 liters of fuel per 100 kilometers of driving. Converting the savings to American miles per gallon isn't easy, so we'll use a practical example. In the US, the Q7's supercharged 3.0-liter V6 returns a combined rating of 21 miles per gallon, which works out to 11.2 liters per 100 kilometers. Apply eROT's 0.7L/100km savings, and the Q7's economy would improve to 10.5L/100km, or 22.4 mpg, a 1.4-mpg improvement. That's not huge, but because math, 0.7L/100km is more dramatic on a more fuel efficient vehicle – taking an A3's 27-mpg combined rating and adding eROT would drive efficiency up 2.4 mpg, for example. There are a few other big benefits beyond fuel and emissions savings – Audi claims eROT provides a more comfortable ride than traditional active suspensions, because engineers can tune the compression and rebound strokes independently of each other. Beyond that, the horizontally oriented rear suspension geometry means more cargo space, since the dampers don't poke up into the cabin like they normally do.

Audi RS7 prototype is world's sportiest self-driving car [w/video]

Audi may not be the only automaker out there toying with self-driving automobile technology, but it is arguably the fastest of them. A few years back, it raced unleashed a driverless TTS on the Bonneville Salt Flats, then sent it up Pikes Peak and around Thunderhill. But now it's taking things a step further with the vehicle you see here.
This RS7 Sportback has been fitted with steering, brakes, throttle and transmission hooked up to a computer system that combines GPS, high-frequency radio signals and 3D imaging camera to drive the vehicle autonomously not just in slow-paced, stop-and-go traffic, but around the track at the same pace a professional racing driver would push it: full throttle on the straights, full braking before the corner and 1.1-g of cornering force.
As promised, Audi plans to unleash the self-driving RS7 - which it calls "the sportiest piloted driving car in the world" - at Hockenheim next weekend prior to the DTM season finale, where it is anticipated to pull a 2:10 lap time. The next stage will be to set it lose on the Nürburgring Nordschleife, all 154 turns and 13 miles of it, which ought to pose a heck of a challenge to the engineers from Ingolstadt. In the meantime you can scope it out in the high-res image gallery above and the second teaser video below.

KBB: VW diesel prices have dropped 16%

There are a lot of post-scandal theories and metrics concerning Volkswagen's performance during the diesel emissions scandal, although none of them has created a clear picture of where things are headed. Kelley Blue Book has a few more to add to the spreadsheet, though, finding that average auction prices for VW diesels and Internet shoppers perusing them have both gone down in the past four weeks on KBB.com. Auction prices on the site are down an average of 16 percent for VW oil burners, which compares to a decline of 2.9 percent for gas-powered VWs. Shoppers are still on the lookout, though, even if the numbers are slightly reduced. Overall, "new-car shopping activity" for the small-capacity VW diesel offerings is down 2.4 percent, a number held partly in check by searches for the Jetta SportWagen being up by 3.7 percent. Shoppers are looking harder at the Audi A3 diesel, too, its activity up 1.6 percent. The Golf, though, is down 3.7 percent and the Golf SportWagen down 6.2 percent. Shoppers leaving the diesel fold aren't necessarily going for high-mileage options, either, KBB saying that the Ford Fusion and Honda Civic are quick alternatives to the Jetta TDI, while the Mercedes CLA and BMW 2 Series are getting new looks from those interested in the Audi A3 diesel. You can read the full release from KBB below. VOLKSWAGEN DIESEL VEHICLE PRICES DECLINE NEARLY 16 PERCENT, ACCORDING TO KELLEY BLUE BOOK DATA New-Car Shopping Activity Also Impacted by Recent Emissions Issue IRVINE, Calif., October 21, 2015 – Kelley Blue Book www.kbb.com, the only vehicle valuation and information source trusted and relied upon by both consumers and the automotive industry, today reports that average auction prices, along with new-car shopping activity on KBB.com, for Volkswagen diesel vehicles have declined four weeks after the diesel emissions issue was announced. The average auction price for Volkswagen diesel models dropped by nearly 16 percent since the news broke of the emissions crisis.[1] The average auction price for the brand's gasoline-powered vehicles declined by 2.9 percent.1 On KBB.com, Volkswagen new-car shopping activity for affected TDI models has decreased on average by 2.4 percent. "According to Kelley Blue Book Field Analysts, some auctions are still holding off on selling the affected Volkswagen inventory," said Tim Fleming, analyst for Kelley Blue Book.